void trans_client(){
	char a;
	a='2';
	send(sockad,&a,1,0);
	char b;

	printf("send or get or quit?[S/G/Q]\n");
	scanf("%c",&a);
	printf("a is %c\n",a);
	send(sockad,&a,1,0);


	for(;a!='Q'&&a!='q';){
		if(a=='S'||a=='s'){
			trans_c_send();
		}
		else if(a=='G'||a=='g'){
			trans_c_get();
		}

		scanf("%c",&b);
		printf("send or get or quit?[S/G/Q]\n");
		scanf("%c",&a);
		scanf("%c",&b);
		send(sockad,&a,1,0);
		printf("a is %c\n",a);


	}


}

void trans_c_send(){
	printf("trans_c_send is running\n");
	char *name;
	char *s;
	int num_name;
	FILE *f;
	int num_text=0;
	char *num_send;
	char a;
	char b;
	int sock_status;

	name=(char *)malloc(sizeof(char)*128);
	s=(char *)malloc(1024*sizeof(char));
	num_send=(char *)malloc(4*sizeof(char));
	memset(name,0,128*sizeof(char));
	memset(s,0,1024*sizeof(char));
	printf("input the name of file:");
	scanf("%s",name);
	num_name=strlen(name);
	sock_status=send(sockad,name,num_name,0);
	for(;sock_status<0;){
		sock_status=send(sockad,name,num_name,0);
	}

	
	f=fopen(name,"r+");
	a=fgetc(f);
	printf("opening file\n");
	for(;a!=EOF;){
		*(s+num_text)=a;
		num_text++;
		a=fgetc(f);
		if(a==EOF){
			int_to_char(num_text,num_send);
			b='Q';
			sock_status=send(sockad,num_send,4,0);
			for(;sock_status<0;){
				sock_status=send(sockad,num_send,4,0);
			}

			sock_status=send(sockad,s,num_text,0);
			for(;sock_status<0;){
				sock_status=send(sockad,s,num_text,0);
			}
			printf("sock_status is %d\n",sock_status);

			sock_status=send(sockad,&b,1,0);
			for(;sock_status<0;){
				sock_status=send(sockad,&b,1,0);
			}
			printf("sock_status is %d\n",sock_status);
			printf("sending %s\n",s);
			printf("sending %c\n",b);
		}
		else if(num_text==1024){
			b='A';
			int_to_char(num_text,num_send);

			sock_status=send(sockad,num_send,4,0);
			for(;sock_status<0;){
				sock_status=send(sockad,num_send,4,0);
			}

			sock_status=send(sockad,s,num_text,0);
			for(;sock_status<0;){
				sock_status=send(sockad,s,num_text,0);
			}

			sock_status=send(sockad,&b,1,0);
			for(;sock_status<0;){
				sock_status=send(sockad,&b,1,0);
			}

			printf("sending %s\n",s);
			printf("sending %c\n",b);

			memset(s,0,1024*sizeof(char));
			num_text=0;
		}
	}
	fclose(f);
	free(s);
	free(name);
	free(num_send);
	printf("exit trans\n");

}



void trans_c_get(){
	char *name;
	char *s;
	name=(char *)malloc(sizeof(char)*128);
	s=(char *)malloc(1024*sizeof(char));
	int num_name;
	memset(name,0,128*sizeof(char));
	printf("input the name of file:");
	scanf("%s",name);
	num_name=strlen(name);
	send(sockad,name,num_name,0);

	free(name);

}


void int_to_char(int num_text,char *num_send){
	int a;
	int i;
	int m;
	int d;
	for(i=0;i<4;i++){
		m=3-i;
		for(d=1;m>0;){
			d=d*10;
			m--;
		}
		m=d;
		a=num_text/m;
		num_text=num_text-a*m;
		num_send[i]=a+48;
	}
}